How far can you reasonably expect to cycle for without food? For me I am tired after about 30 miles. What do people do on 100 milers? Its kind of difficult to carry a full british breky on a bicycle. I would like to do longer rides but dont think I could go any further without an energy boost. I dont suppose burger vans are ideal.

!, although I dont have a typical meal before riding. Trouble is the country roads I would like to try cycling only have the odd burger van and no facilities to top up my water. Would you consider 20mph on a flat a bit too high a pace to maintain over long distance?
The burger van may have water if they are also selling tea and coffee. Your pace over distance is a bit of a personal thing, 20MPH is pretty much my all day pace but yours may be lower or indeed much lower. I don't think you can guage that while eating sausages pre-ride though